./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:28:36,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:28:36,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:28:37,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:28:37,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:28:37,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:28:37,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:28:37,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:28:37,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:28:37,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:28:37,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:28:37,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:28:37,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:28:37,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:28:37,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:28:37,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:28:37,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:28:37,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:28:37,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:28:37,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:28:37,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:28:37,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:28:37,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:28:37,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:28:37,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:28:37,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:28:37,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:28:37,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:28:37,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:28:37,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:28:37,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:28:37,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:28:37,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:28:37,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:28:37,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:28:37,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:28:37,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:28:37,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:28:37,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:28:37,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:28:37,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:28:37,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:28:37,102 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:28:37,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:28:37,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:28:37,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:28:37,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:28:37,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:28:37,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:28:37,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:28:37,107 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:28:37,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:28:37,109 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:28:37,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:28:37,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:28:37,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:28:37,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:28:37,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:28:37,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:28:37,111 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:28:37,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:28:37,111 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:28:37,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:28:37,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:28:37,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:28:37,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:28:37,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:28:37,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:28:37,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:28:37,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:28:37,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:28:37,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:28:37,115 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:28:37,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:28:37,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:28:37,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d [2022-11-20 09:28:37,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:28:37,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:28:37,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:28:37,506 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:28:37,507 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:28:37,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2022-11-20 09:28:41,089 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:28:41,340 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:28:41,341 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2022-11-20 09:28:41,356 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/data/fda868851/45e3f43f498448bbbd3ce00c9998c930/FLAG7827b251b [2022-11-20 09:28:41,379 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/data/fda868851/45e3f43f498448bbbd3ce00c9998c930 [2022-11-20 09:28:41,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:28:41,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:28:41,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:28:41,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:28:41,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:28:41,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:41,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@497915e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41, skipping insertion in model container [2022-11-20 09:28:41,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:41,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:28:41,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:28:41,764 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2022-11-20 09:28:41,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:28:41,804 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:28:41,876 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2022-11-20 09:28:41,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:28:41,912 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:28:41,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41 WrapperNode [2022-11-20 09:28:41,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:28:41,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:28:41,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:28:41,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:28:41,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:41,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:42,006 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 456 [2022-11-20 09:28:42,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:28:42,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:28:42,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:28:42,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:28:42,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:42,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:42,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:42,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:42,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:42,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:42,051 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:42,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:42,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:28:42,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:28:42,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:28:42,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:28:42,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (1/1) ... [2022-11-20 09:28:42,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:28:42,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:42,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:28:42,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:28:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:28:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:28:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:28:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:28:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 09:28:42,188 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 09:28:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 09:28:42,189 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 09:28:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 09:28:42,189 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 09:28:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-20 09:28:42,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-20 09:28:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:28:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 09:28:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 09:28:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 09:28:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:28:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:28:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:28:42,193 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 09:28:42,399 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:28:42,402 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:28:43,324 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:28:43,701 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:28:43,701 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-20 09:28:43,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:28:43 BoogieIcfgContainer [2022-11-20 09:28:43,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:28:43,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:28:43,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:28:43,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:28:43,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:28:41" (1/3) ... [2022-11-20 09:28:43,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52284614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:28:43, skipping insertion in model container [2022-11-20 09:28:43,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:41" (2/3) ... [2022-11-20 09:28:43,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52284614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:28:43, skipping insertion in model container [2022-11-20 09:28:43,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:28:43" (3/3) ... [2022-11-20 09:28:43,717 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2022-11-20 09:28:43,727 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 09:28:43,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:28:43,736 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:28:43,736 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 09:28:43,835 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 09:28:43,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 316 places, 328 transitions, 688 flow [2022-11-20 09:28:44,021 INFO L130 PetriNetUnfolder]: 25/324 cut-off events. [2022-11-20 09:28:44,022 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 09:28:44,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 324 events. 25/324 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 185 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2022-11-20 09:28:44,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 316 places, 328 transitions, 688 flow [2022-11-20 09:28:44,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 311 transitions, 646 flow [2022-11-20 09:28:44,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:44,071 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@35906ccb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:44,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 09:28:44,151 INFO L130 PetriNetUnfolder]: 25/310 cut-off events. [2022-11-20 09:28:44,151 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 09:28:44,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:44,152 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:44,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:44,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1823631829, now seen corresponding path program 1 times [2022-11-20 09:28:44,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:44,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024116957] [2022-11-20 09:28:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:44,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:44,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:44,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024116957] [2022-11-20 09:28:44,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024116957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:44,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:44,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:44,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602046610] [2022-11-20 09:28:44,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:44,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:28:44,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:44,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:28:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:28:44,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 328 [2022-11-20 09:28:44,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 311 transitions, 646 flow. Second operand has 2 states, 2 states have (on average 298.0) internal successors, (596), 2 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:44,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:44,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 328 [2022-11-20 09:28:44,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:45,164 INFO L130 PetriNetUnfolder]: 285/660 cut-off events. [2022-11-20 09:28:45,165 INFO L131 PetriNetUnfolder]: For 89/90 co-relation queries the response was YES. [2022-11-20 09:28:45,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 660 events. 285/660 cut-off events. For 89/90 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1584 event pairs, 147 based on Foata normal form. 147/776 useless extension candidates. Maximal degree in co-relation 831. Up to 387 conditions per place. [2022-11-20 09:28:45,176 INFO L137 encePairwiseOnDemand]: 311/328 looper letters, 20 selfloop transitions, 0 changer transitions 9/294 dead transitions. [2022-11-20 09:28:45,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 294 transitions, 652 flow [2022-11-20 09:28:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:28:45,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:28:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 617 transitions. [2022-11-20 09:28:45,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9405487804878049 [2022-11-20 09:28:45,202 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 617 transitions. [2022-11-20 09:28:45,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 617 transitions. [2022-11-20 09:28:45,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:45,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 617 transitions. [2022-11-20 09:28:45,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:45,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:45,227 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:45,229 INFO L175 Difference]: Start difference. First operand has 299 places, 311 transitions, 646 flow. Second operand 2 states and 617 transitions. [2022-11-20 09:28:45,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 294 transitions, 652 flow [2022-11-20 09:28:45,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 294 transitions, 636 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-20 09:28:45,246 INFO L231 Difference]: Finished difference. Result has 292 places, 285 transitions, 578 flow [2022-11-20 09:28:45,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=578, PETRI_PLACES=292, PETRI_TRANSITIONS=285} [2022-11-20 09:28:45,256 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -7 predicate places. [2022-11-20 09:28:45,256 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 285 transitions, 578 flow [2022-11-20 09:28:45,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 298.0) internal successors, (596), 2 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:45,257 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:45,258 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:45,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:28:45,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:45,259 INFO L85 PathProgramCache]: Analyzing trace with hash 17771237, now seen corresponding path program 1 times [2022-11-20 09:28:45,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518150743] [2022-11-20 09:28:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:45,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:46,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:46,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518150743] [2022-11-20 09:28:46,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518150743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:46,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:46,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:28:46,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753242940] [2022-11-20 09:28:46,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:46,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:28:46,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:28:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:28:46,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 328 [2022-11-20 09:28:46,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 285 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 252.2) internal successors, (1261), 5 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:46,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:46,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 328 [2022-11-20 09:28:46,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:46,682 INFO L130 PetriNetUnfolder]: 309/798 cut-off events. [2022-11-20 09:28:46,682 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-20 09:28:46,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1310 conditions, 798 events. 309/798 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2540 event pairs, 125 based on Foata normal form. 1/746 useless extension candidates. Maximal degree in co-relation 1307. Up to 413 conditions per place. [2022-11-20 09:28:46,689 INFO L137 encePairwiseOnDemand]: 320/328 looper letters, 64 selfloop transitions, 5 changer transitions 4/300 dead transitions. [2022-11-20 09:28:46,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 300 transitions, 761 flow [2022-11-20 09:28:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:28:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:28:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1289 transitions. [2022-11-20 09:28:46,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7859756097560976 [2022-11-20 09:28:46,693 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1289 transitions. [2022-11-20 09:28:46,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1289 transitions. [2022-11-20 09:28:46,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:46,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1289 transitions. [2022-11-20 09:28:46,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 257.8) internal successors, (1289), 5 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:46,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:46,702 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:46,702 INFO L175 Difference]: Start difference. First operand has 292 places, 285 transitions, 578 flow. Second operand 5 states and 1289 transitions. [2022-11-20 09:28:46,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 300 transitions, 761 flow [2022-11-20 09:28:46,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 300 transitions, 761 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:46,708 INFO L231 Difference]: Finished difference. Result has 290 places, 289 transitions, 615 flow [2022-11-20 09:28:46,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=615, PETRI_PLACES=290, PETRI_TRANSITIONS=289} [2022-11-20 09:28:46,710 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -9 predicate places. [2022-11-20 09:28:46,710 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 289 transitions, 615 flow [2022-11-20 09:28:46,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 252.2) internal successors, (1261), 5 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:46,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:46,711 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:46,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:28:46,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:46,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:46,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1052605477, now seen corresponding path program 1 times [2022-11-20 09:28:46,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:46,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285638837] [2022-11-20 09:28:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:46,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:47,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285638837] [2022-11-20 09:28:47,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285638837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:47,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:47,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 09:28:47,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741918144] [2022-11-20 09:28:47,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:47,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:47,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:28:47,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 328 [2022-11-20 09:28:47,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 289 transitions, 615 flow. Second operand has 6 states, 6 states have (on average 247.33333333333334) internal successors, (1484), 6 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:47,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:47,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 328 [2022-11-20 09:28:47,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:47,771 INFO L130 PetriNetUnfolder]: 323/953 cut-off events. [2022-11-20 09:28:47,771 INFO L131 PetriNetUnfolder]: For 118/119 co-relation queries the response was YES. [2022-11-20 09:28:47,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1761 conditions, 953 events. 323/953 cut-off events. For 118/119 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2941 event pairs, 148 based on Foata normal form. 36/945 useless extension candidates. Maximal degree in co-relation 1754. Up to 459 conditions per place. [2022-11-20 09:28:47,780 INFO L137 encePairwiseOnDemand]: 315/328 looper letters, 70 selfloop transitions, 8 changer transitions 49/342 dead transitions. [2022-11-20 09:28:47,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 342 transitions, 993 flow [2022-11-20 09:28:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:28:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2285 transitions. [2022-11-20 09:28:47,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7740514905149052 [2022-11-20 09:28:47,787 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2285 transitions. [2022-11-20 09:28:47,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2285 transitions. [2022-11-20 09:28:47,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:47,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2285 transitions. [2022-11-20 09:28:47,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 253.88888888888889) internal successors, (2285), 9 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:47,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:47,802 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:47,802 INFO L175 Difference]: Start difference. First operand has 290 places, 289 transitions, 615 flow. Second operand 9 states and 2285 transitions. [2022-11-20 09:28:47,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 342 transitions, 993 flow [2022-11-20 09:28:47,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 342 transitions, 982 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-20 09:28:47,810 INFO L231 Difference]: Finished difference. Result has 295 places, 290 transitions, 642 flow [2022-11-20 09:28:47,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=642, PETRI_PLACES=295, PETRI_TRANSITIONS=290} [2022-11-20 09:28:47,814 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -4 predicate places. [2022-11-20 09:28:47,814 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 290 transitions, 642 flow [2022-11-20 09:28:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 247.33333333333334) internal successors, (1484), 6 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:47,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:47,815 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:47,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:28:47,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:47,817 INFO L85 PathProgramCache]: Analyzing trace with hash -27260212, now seen corresponding path program 1 times [2022-11-20 09:28:47,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:47,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218317986] [2022-11-20 09:28:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:47,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:48,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218317986] [2022-11-20 09:28:48,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218317986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:48,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:48,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:28:48,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068091244] [2022-11-20 09:28:48,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:48,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:48,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:48,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:48,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:48,324 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 328 [2022-11-20 09:28:48,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 290 transitions, 642 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:48,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:48,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 328 [2022-11-20 09:28:48,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:48,651 INFO L130 PetriNetUnfolder]: 347/866 cut-off events. [2022-11-20 09:28:48,651 INFO L131 PetriNetUnfolder]: For 262/263 co-relation queries the response was YES. [2022-11-20 09:28:48,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1775 conditions, 866 events. 347/866 cut-off events. For 262/263 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2831 event pairs, 65 based on Foata normal form. 23/855 useless extension candidates. Maximal degree in co-relation 1768. Up to 396 conditions per place. [2022-11-20 09:28:48,660 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 37 selfloop transitions, 6 changer transitions 0/302 dead transitions. [2022-11-20 09:28:48,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 302 transitions, 769 flow [2022-11-20 09:28:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:28:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 09:28:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1173 transitions. [2022-11-20 09:28:48,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8940548780487805 [2022-11-20 09:28:48,663 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1173 transitions. [2022-11-20 09:28:48,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1173 transitions. [2022-11-20 09:28:48,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:48,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1173 transitions. [2022-11-20 09:28:48,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.25) internal successors, (1173), 4 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:48,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:48,671 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:48,672 INFO L175 Difference]: Start difference. First operand has 295 places, 290 transitions, 642 flow. Second operand 4 states and 1173 transitions. [2022-11-20 09:28:48,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 302 transitions, 769 flow [2022-11-20 09:28:48,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 302 transitions, 755 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:28:48,678 INFO L231 Difference]: Finished difference. Result has 292 places, 290 transitions, 644 flow [2022-11-20 09:28:48,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=644, PETRI_PLACES=292, PETRI_TRANSITIONS=290} [2022-11-20 09:28:48,680 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -7 predicate places. [2022-11-20 09:28:48,680 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 290 transitions, 644 flow [2022-11-20 09:28:48,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:48,681 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:48,681 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:48,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:28:48,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash 897588564, now seen corresponding path program 1 times [2022-11-20 09:28:48,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:48,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348069898] [2022-11-20 09:28:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:48,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:49,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:49,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348069898] [2022-11-20 09:28:49,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348069898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:49,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:49,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:28:49,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231018100] [2022-11-20 09:28:49,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:49,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:49,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:49,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:49,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 328 [2022-11-20 09:28:49,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 290 transitions, 644 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:49,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:49,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 328 [2022-11-20 09:28:49,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:49,408 INFO L130 PetriNetUnfolder]: 326/837 cut-off events. [2022-11-20 09:28:49,409 INFO L131 PetriNetUnfolder]: For 315/316 co-relation queries the response was YES. [2022-11-20 09:28:49,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 837 events. 326/837 cut-off events. For 315/316 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2738 event pairs, 56 based on Foata normal form. 22/829 useless extension candidates. Maximal degree in co-relation 1760. Up to 397 conditions per place. [2022-11-20 09:28:49,417 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 37 selfloop transitions, 6 changer transitions 0/302 dead transitions. [2022-11-20 09:28:49,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 302 transitions, 773 flow [2022-11-20 09:28:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:28:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 09:28:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1174 transitions. [2022-11-20 09:28:49,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8948170731707317 [2022-11-20 09:28:49,421 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1174 transitions. [2022-11-20 09:28:49,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1174 transitions. [2022-11-20 09:28:49,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:49,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1174 transitions. [2022-11-20 09:28:49,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.5) internal successors, (1174), 4 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:49,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:49,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:49,428 INFO L175 Difference]: Start difference. First operand has 292 places, 290 transitions, 644 flow. Second operand 4 states and 1174 transitions. [2022-11-20 09:28:49,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 302 transitions, 773 flow [2022-11-20 09:28:49,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 302 transitions, 763 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 09:28:49,435 INFO L231 Difference]: Finished difference. Result has 294 places, 290 transitions, 650 flow [2022-11-20 09:28:49,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=650, PETRI_PLACES=294, PETRI_TRANSITIONS=290} [2022-11-20 09:28:49,437 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -5 predicate places. [2022-11-20 09:28:49,437 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 290 transitions, 650 flow [2022-11-20 09:28:49,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:49,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:49,438 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:49,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:28:49,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:49,439 INFO L85 PathProgramCache]: Analyzing trace with hash 555867276, now seen corresponding path program 1 times [2022-11-20 09:28:49,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:49,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921091467] [2022-11-20 09:28:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:49,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:49,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:49,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921091467] [2022-11-20 09:28:49,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921091467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:49,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:49,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:28:49,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658613037] [2022-11-20 09:28:49,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:49,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:49,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:49,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 328 [2022-11-20 09:28:49,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 290 transitions, 650 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:49,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:49,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 328 [2022-11-20 09:28:49,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:50,292 INFO L130 PetriNetUnfolder]: 422/985 cut-off events. [2022-11-20 09:28:50,292 INFO L131 PetriNetUnfolder]: For 536/537 co-relation queries the response was YES. [2022-11-20 09:28:50,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2250 conditions, 985 events. 422/985 cut-off events. For 536/537 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3618 event pairs, 80 based on Foata normal form. 19/973 useless extension candidates. Maximal degree in co-relation 2241. Up to 403 conditions per place. [2022-11-20 09:28:50,302 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 35 selfloop transitions, 6 changer transitions 4/304 dead transitions. [2022-11-20 09:28:50,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 304 transitions, 787 flow [2022-11-20 09:28:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:28:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 09:28:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1178 transitions. [2022-11-20 09:28:50,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8978658536585366 [2022-11-20 09:28:50,306 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1178 transitions. [2022-11-20 09:28:50,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1178 transitions. [2022-11-20 09:28:50,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:50,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1178 transitions. [2022-11-20 09:28:50,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.5) internal successors, (1178), 4 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:50,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:50,313 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:50,313 INFO L175 Difference]: Start difference. First operand has 294 places, 290 transitions, 650 flow. Second operand 4 states and 1178 transitions. [2022-11-20 09:28:50,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 304 transitions, 787 flow [2022-11-20 09:28:50,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 304 transitions, 777 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 09:28:50,321 INFO L231 Difference]: Finished difference. Result has 296 places, 290 transitions, 656 flow [2022-11-20 09:28:50,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=656, PETRI_PLACES=296, PETRI_TRANSITIONS=290} [2022-11-20 09:28:50,322 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -3 predicate places. [2022-11-20 09:28:50,323 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 290 transitions, 656 flow [2022-11-20 09:28:50,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:50,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:50,324 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:50,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 09:28:50,325 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1724014262, now seen corresponding path program 1 times [2022-11-20 09:28:50,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:50,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005804069] [2022-11-20 09:28:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:50,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:50,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:50,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005804069] [2022-11-20 09:28:50,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005804069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:50,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:50,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 09:28:50,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133128345] [2022-11-20 09:28:50,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:50,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:50,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:50,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:50,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:28:50,666 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 328 [2022-11-20 09:28:50,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 290 transitions, 656 flow. Second operand has 6 states, 6 states have (on average 248.66666666666666) internal successors, (1492), 6 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:50,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:50,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 328 [2022-11-20 09:28:50,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:51,275 INFO L130 PetriNetUnfolder]: 547/1256 cut-off events. [2022-11-20 09:28:51,275 INFO L131 PetriNetUnfolder]: For 629/631 co-relation queries the response was YES. [2022-11-20 09:28:51,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 1256 events. 547/1256 cut-off events. For 629/631 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4707 event pairs, 321 based on Foata normal form. 15/1230 useless extension candidates. Maximal degree in co-relation 3057. Up to 619 conditions per place. [2022-11-20 09:28:51,288 INFO L137 encePairwiseOnDemand]: 318/328 looper letters, 71 selfloop transitions, 8 changer transitions 43/337 dead transitions. [2022-11-20 09:28:51,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 337 transitions, 1024 flow [2022-11-20 09:28:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:28:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2278 transitions. [2022-11-20 09:28:51,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.771680216802168 [2022-11-20 09:28:51,295 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2278 transitions. [2022-11-20 09:28:51,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2278 transitions. [2022-11-20 09:28:51,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:51,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2278 transitions. [2022-11-20 09:28:51,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 253.11111111111111) internal successors, (2278), 9 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,312 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,312 INFO L175 Difference]: Start difference. First operand has 296 places, 290 transitions, 656 flow. Second operand 9 states and 2278 transitions. [2022-11-20 09:28:51,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 337 transitions, 1024 flow [2022-11-20 09:28:51,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 337 transitions, 1014 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 09:28:51,324 INFO L231 Difference]: Finished difference. Result has 304 places, 291 transitions, 674 flow [2022-11-20 09:28:51,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=674, PETRI_PLACES=304, PETRI_TRANSITIONS=291} [2022-11-20 09:28:51,325 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 5 predicate places. [2022-11-20 09:28:51,326 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 291 transitions, 674 flow [2022-11-20 09:28:51,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 248.66666666666666) internal successors, (1492), 6 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:51,327 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:51,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 09:28:51,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:51,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2049960207, now seen corresponding path program 1 times [2022-11-20 09:28:51,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:51,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940014517] [2022-11-20 09:28:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:51,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:28:51,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:51,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940014517] [2022-11-20 09:28:51,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940014517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:51,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:51,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 09:28:51,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936467796] [2022-11-20 09:28:51,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:51,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:28:51,712 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 328 [2022-11-20 09:28:51,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 291 transitions, 674 flow. Second operand has 6 states, 6 states have (on average 249.33333333333334) internal successors, (1496), 6 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:51,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 328 [2022-11-20 09:28:51,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:52,213 INFO L130 PetriNetUnfolder]: 430/1051 cut-off events. [2022-11-20 09:28:52,214 INFO L131 PetriNetUnfolder]: For 544/546 co-relation queries the response was YES. [2022-11-20 09:28:52,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2510 conditions, 1051 events. 430/1051 cut-off events. For 544/546 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3660 event pairs, 248 based on Foata normal form. 5/1023 useless extension candidates. Maximal degree in co-relation 2498. Up to 607 conditions per place. [2022-11-20 09:28:52,225 INFO L137 encePairwiseOnDemand]: 318/328 looper letters, 72 selfloop transitions, 8 changer transitions 23/318 dead transitions. [2022-11-20 09:28:52,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 318 transitions, 948 flow [2022-11-20 09:28:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:28:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2258 transitions. [2022-11-20 09:28:52,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7649051490514905 [2022-11-20 09:28:52,232 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2258 transitions. [2022-11-20 09:28:52,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2258 transitions. [2022-11-20 09:28:52,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:52,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2258 transitions. [2022-11-20 09:28:52,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 250.88888888888889) internal successors, (2258), 9 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:52,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:52,248 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:52,248 INFO L175 Difference]: Start difference. First operand has 304 places, 291 transitions, 674 flow. Second operand 9 states and 2258 transitions. [2022-11-20 09:28:52,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 318 transitions, 948 flow [2022-11-20 09:28:52,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 318 transitions, 930 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-20 09:28:52,258 INFO L231 Difference]: Finished difference. Result has 306 places, 292 transitions, 684 flow [2022-11-20 09:28:52,258 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=684, PETRI_PLACES=306, PETRI_TRANSITIONS=292} [2022-11-20 09:28:52,261 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 7 predicate places. [2022-11-20 09:28:52,262 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 292 transitions, 684 flow [2022-11-20 09:28:52,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.33333333333334) internal successors, (1496), 6 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:52,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:52,277 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:52,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:28:52,282 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:52,283 INFO L85 PathProgramCache]: Analyzing trace with hash 710426636, now seen corresponding path program 1 times [2022-11-20 09:28:52,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:52,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522922276] [2022-11-20 09:28:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:52,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:28:52,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522922276] [2022-11-20 09:28:52,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522922276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:52,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:52,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 09:28:52,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350109323] [2022-11-20 09:28:52,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:52,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:52,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:52,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:52,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:28:52,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 328 [2022-11-20 09:28:52,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 292 transitions, 684 flow. Second operand has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:52,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:52,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 328 [2022-11-20 09:28:52,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:53,236 INFO L130 PetriNetUnfolder]: 440/1036 cut-off events. [2022-11-20 09:28:53,236 INFO L131 PetriNetUnfolder]: For 541/543 co-relation queries the response was YES. [2022-11-20 09:28:53,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2530 conditions, 1036 events. 440/1036 cut-off events. For 541/543 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3677 event pairs, 255 based on Foata normal form. 9/1011 useless extension candidates. Maximal degree in co-relation 2517. Up to 604 conditions per place. [2022-11-20 09:28:53,248 INFO L137 encePairwiseOnDemand]: 320/328 looper letters, 75 selfloop transitions, 6 changer transitions 14/310 dead transitions. [2022-11-20 09:28:53,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 310 transitions, 934 flow [2022-11-20 09:28:53,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:28:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1769 transitions. [2022-11-20 09:28:53,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7704703832752613 [2022-11-20 09:28:53,255 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1769 transitions. [2022-11-20 09:28:53,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1769 transitions. [2022-11-20 09:28:53,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:53,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1769 transitions. [2022-11-20 09:28:53,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 252.71428571428572) internal successors, (1769), 7 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 328.0) internal successors, (2624), 8 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,268 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 328.0) internal successors, (2624), 8 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,268 INFO L175 Difference]: Start difference. First operand has 306 places, 292 transitions, 684 flow. Second operand 7 states and 1769 transitions. [2022-11-20 09:28:53,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 310 transitions, 934 flow [2022-11-20 09:28:53,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 310 transitions, 914 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-20 09:28:53,276 INFO L231 Difference]: Finished difference. Result has 306 places, 293 transitions, 688 flow [2022-11-20 09:28:53,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=688, PETRI_PLACES=306, PETRI_TRANSITIONS=293} [2022-11-20 09:28:53,278 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 7 predicate places. [2022-11-20 09:28:53,279 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 293 transitions, 688 flow [2022-11-20 09:28:53,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:53,280 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 09:28:53,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:53,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1267001627, now seen corresponding path program 1 times [2022-11-20 09:28:53,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:53,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985154538] [2022-11-20 09:28:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:53,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:28:53,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:53,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985154538] [2022-11-20 09:28:53,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985154538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:53,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:53,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:53,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686221674] [2022-11-20 09:28:53,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:53,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:53,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:53,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:53,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:53,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 328 [2022-11-20 09:28:53,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 293 transitions, 688 flow. Second operand has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:53,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 328 [2022-11-20 09:28:53,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:54,125 INFO L130 PetriNetUnfolder]: 212/717 cut-off events. [2022-11-20 09:28:54,125 INFO L131 PetriNetUnfolder]: For 399/407 co-relation queries the response was YES. [2022-11-20 09:28:54,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 717 events. 212/717 cut-off events. For 399/407 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2050 event pairs, 95 based on Foata normal form. 4/683 useless extension candidates. Maximal degree in co-relation 1411. Up to 294 conditions per place. [2022-11-20 09:28:54,133 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 27 selfloop transitions, 2 changer transitions 4/298 dead transitions. [2022-11-20 09:28:54,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 298 transitions, 770 flow [2022-11-20 09:28:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:28:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2022-11-20 09:28:54,137 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9024390243902439 [2022-11-20 09:28:54,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2022-11-20 09:28:54,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2022-11-20 09:28:54,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:54,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2022-11-20 09:28:54,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:54,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:54,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:54,144 INFO L175 Difference]: Start difference. First operand has 306 places, 293 transitions, 688 flow. Second operand 3 states and 888 transitions. [2022-11-20 09:28:54,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 298 transitions, 770 flow [2022-11-20 09:28:54,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 298 transitions, 758 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-20 09:28:54,151 INFO L231 Difference]: Finished difference. Result has 303 places, 294 transitions, 690 flow [2022-11-20 09:28:54,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=690, PETRI_PLACES=303, PETRI_TRANSITIONS=294} [2022-11-20 09:28:54,154 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 4 predicate places. [2022-11-20 09:28:54,155 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 294 transitions, 690 flow [2022-11-20 09:28:54,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:54,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:54,156 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:54,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 09:28:54,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:54,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1765096063, now seen corresponding path program 1 times [2022-11-20 09:28:54,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:54,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60935502] [2022-11-20 09:28:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:54,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:28:55,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:55,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60935502] [2022-11-20 09:28:55,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60935502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:55,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294962892] [2022-11-20 09:28:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:55,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:55,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:55,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:55,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:28:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:55,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:28:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:28:56,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:28:57,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294962892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:57,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:57,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-11-20 09:28:57,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927537979] [2022-11-20 09:28:57,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:57,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:28:57,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:57,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:28:57,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:28:57,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 328 [2022-11-20 09:28:57,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 294 transitions, 690 flow. Second operand has 24 states, 24 states have (on average 234.91666666666666) internal successors, (5638), 24 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:57,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:57,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 328 [2022-11-20 09:28:57,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:59,372 INFO L130 PetriNetUnfolder]: 335/1560 cut-off events. [2022-11-20 09:28:59,372 INFO L131 PetriNetUnfolder]: For 815/823 co-relation queries the response was YES. [2022-11-20 09:28:59,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1560 events. 335/1560 cut-off events. For 815/823 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 6654 event pairs, 109 based on Foata normal form. 51/1551 useless extension candidates. Maximal degree in co-relation 3042. Up to 291 conditions per place. [2022-11-20 09:28:59,385 INFO L137 encePairwiseOnDemand]: 295/328 looper letters, 77 selfloop transitions, 30 changer transitions 197/507 dead transitions. [2022-11-20 09:28:59,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 507 transitions, 1965 flow [2022-11-20 09:28:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 09:28:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-20 09:28:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 12154 transitions. [2022-11-20 09:28:59,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.712593808630394 [2022-11-20 09:28:59,410 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 12154 transitions. [2022-11-20 09:28:59,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 12154 transitions. [2022-11-20 09:28:59,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:59,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 12154 transitions. [2022-11-20 09:28:59,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 233.73076923076923) internal successors, (12154), 52 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:59,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 328.0) internal successors, (17384), 53 states have internal predecessors, (17384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:59,473 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 328.0) internal successors, (17384), 53 states have internal predecessors, (17384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:59,474 INFO L175 Difference]: Start difference. First operand has 303 places, 294 transitions, 690 flow. Second operand 52 states and 12154 transitions. [2022-11-20 09:28:59,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 507 transitions, 1965 flow [2022-11-20 09:28:59,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 507 transitions, 1952 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:59,485 INFO L231 Difference]: Finished difference. Result has 374 places, 302 transitions, 844 flow [2022-11-20 09:28:59,485 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=844, PETRI_PLACES=374, PETRI_TRANSITIONS=302} [2022-11-20 09:28:59,486 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 75 predicate places. [2022-11-20 09:28:59,486 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 302 transitions, 844 flow [2022-11-20 09:28:59,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 234.91666666666666) internal successors, (5638), 24 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:59,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:59,489 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:59,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 09:28:59,696 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:28:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1025248033, now seen corresponding path program 2 times [2022-11-20 09:28:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585418827] [2022-11-20 09:28:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:59,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 09:29:00,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:00,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585418827] [2022-11-20 09:29:00,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585418827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:00,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:00,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:29:00,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573772869] [2022-11-20 09:29:00,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:00,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:29:00,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:00,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:29:00,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:29:00,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 328 [2022-11-20 09:29:00,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 302 transitions, 844 flow. Second operand has 5 states, 5 states have (on average 287.6) internal successors, (1438), 5 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:00,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:29:00,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 328 [2022-11-20 09:29:00,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:29:01,118 INFO L130 PetriNetUnfolder]: 588/1645 cut-off events. [2022-11-20 09:29:01,119 INFO L131 PetriNetUnfolder]: For 2622/2660 co-relation queries the response was YES. [2022-11-20 09:29:01,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4409 conditions, 1645 events. 588/1645 cut-off events. For 2622/2660 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8278 event pairs, 138 based on Foata normal form. 28/1563 useless extension candidates. Maximal degree in co-relation 4374. Up to 387 conditions per place. [2022-11-20 09:29:01,141 INFO L137 encePairwiseOnDemand]: 317/328 looper letters, 49 selfloop transitions, 16 changer transitions 0/335 dead transitions. [2022-11-20 09:29:01,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 335 transitions, 1148 flow [2022-11-20 09:29:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:29:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:29:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1474 transitions. [2022-11-20 09:29:01,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8987804878048781 [2022-11-20 09:29:01,145 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1474 transitions. [2022-11-20 09:29:01,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1474 transitions. [2022-11-20 09:29:01,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:29:01,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1474 transitions. [2022-11-20 09:29:01,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:01,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:01,153 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:01,154 INFO L175 Difference]: Start difference. First operand has 374 places, 302 transitions, 844 flow. Second operand 5 states and 1474 transitions. [2022-11-20 09:29:01,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 335 transitions, 1148 flow [2022-11-20 09:29:01,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 335 transitions, 1050 flow, removed 32 selfloop flow, removed 26 redundant places. [2022-11-20 09:29:01,166 INFO L231 Difference]: Finished difference. Result has 326 places, 311 transitions, 890 flow [2022-11-20 09:29:01,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=890, PETRI_PLACES=326, PETRI_TRANSITIONS=311} [2022-11-20 09:29:01,168 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 27 predicate places. [2022-11-20 09:29:01,168 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 311 transitions, 890 flow [2022-11-20 09:29:01,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 287.6) internal successors, (1438), 5 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:01,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:29:01,171 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:01,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 09:29:01,171 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:29:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash 182415363, now seen corresponding path program 1 times [2022-11-20 09:29:01,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:01,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063387695] [2022-11-20 09:29:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:29:01,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:01,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063387695] [2022-11-20 09:29:01,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063387695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73195288] [2022-11-20 09:29:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:01,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:01,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:01,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:01,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:29:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:02,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:29:02,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:29:03,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:29:03,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73195288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:03,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:03,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-11-20 09:29:03,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539423830] [2022-11-20 09:29:03,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:03,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 09:29:03,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:03,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 09:29:03,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:29:03,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 328 [2022-11-20 09:29:03,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 311 transitions, 890 flow. Second operand has 28 states, 28 states have (on average 238.60714285714286) internal successors, (6681), 28 states have internal predecessors, (6681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:03,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:29:03,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 328 [2022-11-20 09:29:03,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:29:05,653 INFO L130 PetriNetUnfolder]: 606/1935 cut-off events. [2022-11-20 09:29:05,653 INFO L131 PetriNetUnfolder]: For 3023/3051 co-relation queries the response was YES. [2022-11-20 09:29:05,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5204 conditions, 1935 events. 606/1935 cut-off events. For 3023/3051 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9432 event pairs, 296 based on Foata normal form. 9/1797 useless extension candidates. Maximal degree in co-relation 5179. Up to 865 conditions per place. [2022-11-20 09:29:05,675 INFO L137 encePairwiseOnDemand]: 298/328 looper letters, 83 selfloop transitions, 28 changer transitions 73/393 dead transitions. [2022-11-20 09:29:05,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 393 transitions, 1578 flow [2022-11-20 09:29:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:29:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 09:29:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5774 transitions. [2022-11-20 09:29:05,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7334857723577236 [2022-11-20 09:29:05,688 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5774 transitions. [2022-11-20 09:29:05,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5774 transitions. [2022-11-20 09:29:05,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:29:05,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5774 transitions. [2022-11-20 09:29:05,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 240.58333333333334) internal successors, (5774), 24 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:05,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 328.0) internal successors, (8200), 25 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:05,724 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 328.0) internal successors, (8200), 25 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:05,724 INFO L175 Difference]: Start difference. First operand has 326 places, 311 transitions, 890 flow. Second operand 24 states and 5774 transitions. [2022-11-20 09:29:05,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 393 transitions, 1578 flow [2022-11-20 09:29:05,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 393 transitions, 1528 flow, removed 23 selfloop flow, removed 1 redundant places. [2022-11-20 09:29:05,737 INFO L231 Difference]: Finished difference. Result has 357 places, 315 transitions, 982 flow [2022-11-20 09:29:05,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=982, PETRI_PLACES=357, PETRI_TRANSITIONS=315} [2022-11-20 09:29:05,740 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 58 predicate places. [2022-11-20 09:29:05,740 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 315 transitions, 982 flow [2022-11-20 09:29:05,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 238.60714285714286) internal successors, (6681), 28 states have internal predecessors, (6681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:05,742 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:29:05,744 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:05,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:05,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 09:29:05,952 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:29:05,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1975781468, now seen corresponding path program 2 times [2022-11-20 09:29:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:05,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818190692] [2022-11-20 09:29:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:05,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 09:29:06,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:06,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818190692] [2022-11-20 09:29:06,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818190692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:06,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:06,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:29:06,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489973125] [2022-11-20 09:29:06,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:06,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:29:06,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:06,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:29:06,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:29:06,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 328 [2022-11-20 09:29:06,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 315 transitions, 982 flow. Second operand has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:06,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:29:06,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 328 [2022-11-20 09:29:06,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:29:07,979 INFO L130 PetriNetUnfolder]: 1522/3939 cut-off events. [2022-11-20 09:29:07,980 INFO L131 PetriNetUnfolder]: For 6048/6098 co-relation queries the response was YES. [2022-11-20 09:29:08,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10971 conditions, 3939 events. 1522/3939 cut-off events. For 6048/6098 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 27325 event pairs, 275 based on Foata normal form. 79/3728 useless extension candidates. Maximal degree in co-relation 10936. Up to 813 conditions per place. [2022-11-20 09:29:08,042 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 84 selfloop transitions, 5 changer transitions 0/366 dead transitions. [2022-11-20 09:29:08,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 366 transitions, 1472 flow [2022-11-20 09:29:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:29:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 09:29:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1200 transitions. [2022-11-20 09:29:08,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9146341463414634 [2022-11-20 09:29:08,045 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1200 transitions. [2022-11-20 09:29:08,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1200 transitions. [2022-11-20 09:29:08,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:29:08,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1200 transitions. [2022-11-20 09:29:08,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:08,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:08,051 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:08,052 INFO L175 Difference]: Start difference. First operand has 357 places, 315 transitions, 982 flow. Second operand 4 states and 1200 transitions. [2022-11-20 09:29:08,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 366 transitions, 1472 flow [2022-11-20 09:29:08,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 366 transitions, 1358 flow, removed 36 selfloop flow, removed 15 redundant places. [2022-11-20 09:29:08,069 INFO L231 Difference]: Finished difference. Result has 339 places, 318 transitions, 930 flow [2022-11-20 09:29:08,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=930, PETRI_PLACES=339, PETRI_TRANSITIONS=318} [2022-11-20 09:29:08,071 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 40 predicate places. [2022-11-20 09:29:08,071 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 318 transitions, 930 flow [2022-11-20 09:29:08,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:08,072 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:29:08,072 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:08,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 09:29:08,073 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 09:29:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash 98149072, now seen corresponding path program 1 times [2022-11-20 09:29:08,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:08,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696841220] [2022-11-20 09:29:08,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:08,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:39,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:39,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696841220] [2022-11-20 09:29:39,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696841220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:39,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355983197] [2022-11-20 09:29:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:39,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:39,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:39,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:39,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a3300d-64fc-4140-bd48-66c82291da39/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:29:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:40,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-20 09:29:40,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:51,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:29:52,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:29:57,089 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 09:29:57,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 09:29:58,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:30:02,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:30:03,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:30:04,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:30:04,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:30:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:12,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:49,718 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:34:51,585 WARN L233 SmtUtils]: Spent 20.85s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:35:48,607 WARN L233 SmtUtils]: Spent 8.60s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:36:40,554 WARN L233 SmtUtils]: Spent 17.50s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:37:42,746 WARN L233 SmtUtils]: Spent 12.58s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:38:56,739 WARN L233 SmtUtils]: Spent 15.30s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:40:02,673 WARN L233 SmtUtils]: Spent 12.29s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:41:19,980 WARN L233 SmtUtils]: Spent 17.57s on a formula simplification that was a NOOP. DAG size: 275 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:42:51,793 WARN L233 SmtUtils]: Spent 14.24s on a formula simplification that was a NOOP. DAG size: 278 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)